Purpose. Scientific work aims at the development and testing of information system to meet the challenges of concrete composition design and control (for railway structures and buildings) based on the physico-analytical method algorithm for hydraulic concrete composition calculation. Methodology. The proposed algorithm of hydraulic concrete composition calculation is based on the physicochemical mechanics and in particular on the rheology of elastic-viscous-plastic bodies. The system of canonical equations consists of the equations for concrete strength, absolute volume, concrete mix consistency as well as the equation for optimal concrete saturation with aggregates while minimizing cement content. The joint solution of these four equations related to composition allows determining for the materials the concrete composition of required strength, concrete workability with minimum cement content. The procedure for calculation of hydraulic concrete composition according to the physico-analytical method consists of two parts: 1) physical, which is laboratory testing of concrete mix components in different concrete compositions; 2) analytical, which represents the calculation algorithm for concrete compositions equivalent in concrete strength and workability that comply with the specific conditions of concrete placing. Findings. To solve the problem of designing the concrete composition with the desired properties for railway structures and buildings it was proposed to use the information technology in the form of a developed computer program whose algorithm includes the physico-analytical method for hydraulic concrete composition determination. Originality. The developed concrete composition design method takes into account the basic properties of raw materials, concrete mix and concrete, which are predetermined. The distinctive feature of physico-analytical method is obtaining of a set of equivalent compositions with a certain concrete mix consistency and required concrete strength, which allows to optimize the concrete composition by any optimality criterion, depending on the operation conditions. Practical value. Using the developed method will expand its functionality when applied in the form of the composition calculation computer program for the construction and repair of surface and underwater structures. The use of physico-analytical method at production site will simultaneously solve the economic problems of construction and maintenance cost reduction, component saving and ensure obtaining the concrete with the set properties for specific operation conditions of transport engineering structures.

In the article ecological and exploitation advantages of heat-insulation is considered on the basis of foam glass. Influence of different influences is described, such as deformation, oxidization, erosion, over falls of temperature, attacks such properties is rotined, as no burning, ecological, sanitary, chemical and biological safety.

Purpose. To probe interaction of correct polyhedra, to form new, semicorrect forms. To get the formulas of correlations and visual images of polyhedra. Methodology. Researches were conducted by a spatial design in the AutoCAD system. Findings. Certain correlations of sizes and mutual location of bodies of Plato are found – hexahedron and octahedron, at which the bodies of Archimedes are forming. There are truncated hexahedron, truncated octahedron, hexaoktahedron, rombohexaoktahedron, psevdorombohexaoktahedron and truncated hexaoktahedron. The sequence of constructions is expounded, the visual images of the studied objects are got. Originality. In spite ofthe fact that polyhedra were studied by humanity from times of Plato, the use of computer technologies allows to consider the offered theme from the new point of view. Creating polyhedra as hardbodies models, we have got possibility to trace the process of transformation of correct polyhedra in semicorrect. Calculations, resulted in the article, does not meet in literature, consequently offered first. Practical value. It is known that multifaceted forms are widely use in architecture. However, images of polyhedra, executed the methods of engineering graphic arts, areperceived rather difficultly. Therefore the making of spatial models of polyhedra is actual. And the use of computer technologies considerably reduce operating time and gives practically unlimited possibilities of visualization. Materials of the article also can be recommended for the study of stereometry and descriptive geometry.

Purpose. Analyze scientific publications on the existing problems of environmental pollution by secondary industrial products. Search for ways to solve these issues through the rational use of concrete in construction with additives of secondary industrial products, especially fine-grained ones. Determination of rational compositions of medium-strength concrete with the minimum required consumption of cement and filler from iron ore dressing wastes of mining and processing plants. Methodology. To achieve this goal, the experience of improving the structure and properties of concrete by introducing complex additives based on secondary industrial products into its composition is analyzed. The following materials were used for the research: Portland cement CEM 41.7 from Krivoy Rog; as a large aggregate – crushed granite with a maximum grain size of 20 mm; fine aggregate – river quartz sand; mineral additives – products of concentration of iron ores of the Southern Mining and Processing Plant. The experiment was carried out on certified equipment. Control specimens with a side of 10 cm were formed. The compressive strength of concrete was determined according to a standard procedure. Based on the results of the mathematical analysis, graphical dependences of the change in the optimized characteristics on the variable parameters – the consumption of cement, the products of concentration of iron ores and the plasticizer – were built. Findings. Based on the results of testing the samples, the calculation of mathematical models of the experiment was carried out and polynomials of the third degree were obtained for the optimized parameters – the average strength of the samples and the coefficient of efficiency of using cement. The following patterns can be distinguished. The strength of concrete depends to the greatest extent on the consumption of cement in the composition of the concrete mixture and increases significantly with an increase in its content within the studied limits. With an increase in the filler content in the studied range, the strength of concrete, and, accordingly, the coefficient of efficiency of using cement increases with a decrease in the content of cement in the composition of the concrete mixture. Originality. The studies carried out make it possible to determine the main regularities of increasing the efficiency of cement use when utilizing local secondary industrial products in concrete, namely, the introduction of iron ore dressing waste from mining and processing plants as a fine-grained additive in concrete. It was found that it is possible to obtain the required low concrete strength with a significantly lower cement consumption by ensuring a rational grain size composition of the concrete mixture components. Practical value. When designing concrete compositions with a high coefficient of cement utilization, it is necessary to use the obtained research results, providing cement savings and utilizing a significant amount of fine-grained secondary industrial products.

The article deals with one of the areas of recycling glass industry as an effective heat-isolation materials. Modern insulating material with high physical-mechanical and former expluatation properties have foam glass.